Overnight rains didn't stop some 80,000 ticketholders from getting their feet a little dirty on the festival's final day, which included a midday performance by Austin's own Gary Clark Jr. The local bluesman introduced a sprawling crowd to tunes from his debut album, "Black and Blu," which will hit retailers next week (10/22).

Over at Austin Kiddie Limits -- a sizable kid-focused area complete with an instrument "petting zoo" and a smaller stage -- pint-sized musicians from the local School of Rock performed alongside Iggy & The Stooges guitarist James Williamson.

Grammy-winning folk duo The Civil Wars took to the massive AMD stage, which fit them and their audience nicely, unlike The Lumineers, who followed on the smaller Austin Ventures stage. The buzz band amassed a sizable crowd that overflowed into the food trailer area, clogging up thoroughfares and causing ground staff to push fences back slightly.

The biggest rock star moment came with Iggy & The Stooges. Just a couple songs into his late afternoon set, Iggy Pop announced, "I'm lonely. Bum rush this fucking stage." Dozens of eager fans responded, pushing past the security barricades and joining the shirtless rocker on stage for "Shake Appeal." Meanwhile, The Avett Brothers worked their calmer crowd over on the opposite side of the park with a jam-packed set featuring tunes culled mostly from their last two albums.

Sound bleed struck again, this time for the Randy Rogers Band, whose country-tinged set was held hostage by Canadian electronic duo Crystal Castles, who were performing their synth-heavy experimental creations on the nearby Honda stage.

The 2012 Austin City Limits Festival closed with a full two-hour performance by the Red Hot Chili Peppers, which seemed to satisfy the dozens of fans who had camped out at the front of the Bud Light stage all day in anxious anticipation. Anthony Kiedis and crew held their own at their first ACL Fest gig, mixing classics like "Otherside," "Under the Bridge" and "Californication" with a handful of tracks from their latest collection, last year's "I'm With You." The four-song encore mixed fan favorites like "Sir Psycho Sexy" and the sing-along "Under the Bridge" with the Robert Johnson cover "They're Red Hot," marking a near perfect finale to a long, hot three days of music.

Next year, the Austin City Limits Festival will take over two weekends -- Oct. 4-6 and Oct. 11-13, according to the Austin-American Statesman.

The first round of early-bird tickets for the 2013 festivities will likely go on sale in the coming days, and subscribers to the ACL Fest e-list will be the first to know.